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Publish/Subscribe Tree Construction in Wireless Ad-Hoc Networks

  • Yongqiang Huang
  • Hector Garcia-Molina
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2574)

Abstract

Wireless ad-hoc publish/subscribe systems combine a publish/subscribe mechanism with wireless ad-hoc networking. The combination, although very attractive, has not been studied extensively in the literature. This paper addresses an important problem of such systems: how to construct an optimal publish/ subscribe tree for routing information from the source to all interested recipients. First we precisely define the optimality of a publish/subscribe tree by developing a metric to evaluate its “efficiency.” The optimality metric takes into account both the goal of a publish/subscribe system (i.e., to route a set of events), and the characteristics of an ad-hoc network (for example, devices are resource limited). We propose a greedy algorithm, Shop Parent, which builds the publish/ subscribe tree in a fully distributed fashion. A key feature is that this algorithm can be “subscription-aware”, allowing it to use publication/subscription information in order to find a better outcome. Our simulations show that Shop Parent’s performance is within 15% of optimal under normal configurations. We also study the effect of geographically localized subscriptions.

Keywords

Span Tree Connectivity Graph Steiner Tree Tree Construction Event Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Yongqiang Huang
    • 1
  • Hector Garcia-Molina
    • 1
  1. 1.Stanford UniversityStanford

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